1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/src/crypto/DataLengthException.cs b/crypto/src/crypto/DataLengthException.cs
index e9efc0bd3..447ff2a17 100644
--- a/crypto/src/crypto/DataLengthException.cs
+++ b/crypto/src/crypto/DataLengthException.cs
@@ -8,7 +8,7 @@ namespace Org.BouncyCastle.Crypto
      * insufficient input. In general this exception will Get thrown rather
      * than an ArrayOutOfBounds exception.
      */
-#if !(NETCF_1_0 || NETCF_2_0 || SILVERLIGHT)
+#if !(NETCF_1_0 || NETCF_2_0 || SILVERLIGHT || PORTABLE)
     [Serializable]
 #endif
     public class DataLengthException